An undershoot/overshoot-suppressed current-mode buck converter with voltage-setting control for type-II compensator

Pai Yi Wang, Szu Yu Huang, Kuan Yu Fang, Tai Haur Kuo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Current-mode control is frequently used in dc-dc buck converters. Many current-mode buck converters apply type-II compensators for obtaining high loop gain to reduce the steady-state error and maintaining the loop stability with restricted bandwidth. However, when large load-current transients occur, significant transient undershoot/overshoot is generated due to the restricted loop bandwidth. In response, a type-II compensator with the proposed voltage-setting control (VSC) is presented in this paper. By simply setting the voltage of the compensation capacitor and the input voltage of the compensator, the proposed VSC, which is activated by a transient detector, greatly suppresses the transient undershoot and overshoot. Implemented in 0.35μm CMOS process, this work occupies 0.91mm2 including pads, and features a peak efficiency of 96.3%. With the proposed method, the maximum undershoot and overshoot are respectively suppressed from 150mV to 58mV and 92mV to 62mV for ± 1A load current steps.

Original languageEnglish
Title of host publication2015 IEEE Asian Solid-State Circuits Conference, A-SSCC 2015 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467371919
DOIs
Publication statusPublished - 2016 Jan 19
Event11th IEEE Asian Solid-State Circuits Conference, A-SSCC 2015 - Xiamen, Fujian, China
Duration: 2015 Nov 92015 Nov 11

Publication series

Name2015 IEEE Asian Solid-State Circuits Conference, A-SSCC 2015 - Proceedings

Other

Other11th IEEE Asian Solid-State Circuits Conference, A-SSCC 2015
CountryChina
CityXiamen, Fujian
Period15-11-0915-11-11

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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